Reinstall from macOS Recovery
Jun 25, 2018 How to access Microsoft Remote Desktop on your Mac by Conner Forrest in Software on June 25, 2018, 7:54 AM PST If you need to access Windows applications through your Mac, a remote desktop. Aug 13, 2019 Format a USB flash drive. Start your Mac from macOS. Plug the USB flash drive into your Mac. Open Disk Utility, which is in the Utilities folder of your Applications folder. Choose View Show All Devices from the menu bar. From the sidebar in Disk Utility, select your USB flash drive.
macOS Recovery makes it easy to reinstall the Mac operating system, even if you need to erase your startup disk first. All you need is a connection to the Internet. If a wireless network is available, you can choose it from the Wi-Fi menu in the menu bar. This menu is also available in macOS Recovery.
1. Start up from macOS Recovery
To start up from macOS Recovery, turn on your Mac and immediately press and hold one of the following combinations on your keyboard. Release the keys when you see an Apple logo, spinning globe, or other startup screen.
Command (⌘)-R
Reinstall the latest macOS that was installed on your Mac (recommended).
Option-⌘-R
Upgrade to the latest macOS that is compatible with your Mac.
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Shift-Option-⌘-R
Reinstall the macOS that came with your Mac, or the closest version still available.
You might be prompted to enter a password, such as a firmware password or the password of a user who is an administrator of this Mac. Enter the requested password to continue.
When you see the utilities window, you have started up from macOS Recovery.
2. Decide whether to erase (format) your disk
You probably don't need to erase, unless you're selling, trading in, or giving away your Mac, or you have an issue that requires you to erase. If you need to erase before installing macOS, select Disk Utility from the Utilities window, then click Continue. Learn more about when and how to erase.
3. Install macOS
When you're ready to reinstall macOS, choose Reinstall macOS from the Utilities window. Then click Continue and follow the onscreen instructions. You will be asked to choose a disk on which to install.
- If the installer asks to unlock your disk, enter the password you use to log in to your Mac.
- If the installer doesn't see your disk, or it says that it can't install on your computer or volume, you might need to erase your disk first.
- If the installer is for a different version of macOS than you expected, learn about macOS Recovery exceptions.
Please allow installation to complete without putting your Mac to sleep or closing its lid. During installation, your Mac might restart and show a progress bar several times, and the screen might be empty for minutes at a time.
If your Mac restarts to a setup assistant, but you're selling it, trading it in, or giving it away, press Command-Q to quit the assistant without completing setup. Then click Shut Down. When the new owner starts up the Mac, they can use their own information to complete setup.
macOS Recovery exceptions
The version of macOS offered by macOS Recovery might differ in certain circumstances:
- If macOS Sierra 10.12.4 or later has never been installed on this Mac, Option-Command-R installs the macOS that came with your Mac, or the closest version still available. And Shift-Option-Command-R isn't available.
- If you erased your entire disk instead of just the startup volume on that disk, macOS Recovery might offer only the macOS that came with your Mac, or the closest version still available. You can upgrade to a later version afterward.
- If your Mac has the Apple T2 Security Chip and you never installed a macOS update, Option-Command-R installs the latest macOS that was installed on your Mac.
- If you just had your Mac logic board replaced during a repair, macOS Recovery might offer only the latest macOS that is compatible with your Mac.
If you can't get macOS Recovery to offer the installer you want, you might be able to use one of the other ways to install macOS.
Other ways to install macOS
- You can also install macOS from the App Store or Software Update preferences. If you can't install macOS Catalina, you might be able to install an earlier macOS, such as macOS Mojave, High Sierra, Sierra, El Capitan, or Yosemite.
- Or create a bootable installer disk, then use that disk to install macOS on your Mac or another Mac.
When you install Microsoft Windows on your Mac, Boot Camp Assistant automatically opens the Boot Camp installer, which installs the latest Windows support software (drivers). If that doesn't happen, or you experience any of the following issues while using Windows on your Mac, follow the steps in this article.
- Your Apple mouse, trackpad, or keyboard isn't working in Windows.
Force Touch isn't designed to work in Windows. - You don't hear audio from the built-in speakers of your Mac in Windows.
- The built-in microphone or camera of your Mac isn't recognized in Windows.
- One or more screen resolutions are unavailable for your display in Windows.
- You can't adjust the brightness of your built-in display in Windows.
- You have issues with Bluetooth or Wi-Fi in Windows.
- You get an alert that Apple Software Update has stopped working.
- You get a message that your PC has a driver or service that isn't ready for this version of Windows.
- Your Mac starts up to a black or blue screen after you install Windows.
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If your Mac has an AMD video card and is having graphics issues in Windows, you might need to update your AMD graphics drivers instead.
Install the latest macOS updates
Before proceeding, install the latest macOS updates, which can include updates to Boot Camp.
Format a USB flash drive
To install the latest Windows support software, you need a 16GB or larger USB flash drive formatted as MS-DOS (FAT).
- Start your Mac from macOS.
- Plug the USB flash drive into your Mac.
- Open Disk Utility, which is in the Utilities folder of your Applications folder.
- Choose View > Show All Devices from the menu bar.
- From the sidebar in Disk Utility, select your USB flash drive. (Select the drive name, not the volume name beneath it.)
- Click the Erase button or tab.
- Choose MS-DOS (FAT) as the format and Master Boot Record as the scheme.
- Click Erase to format the drive. When done, quit Disk Utility.
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Download the Windows support software
After preparing your USB flash drive, complete these steps:
- Make sure that your Mac is connected to the Internet.
- Open Boot Camp Assistant, which is in the Utilities folder of your Applications folder.
- From the menu bar at the top of your screen, choose Action > Download Windows Support Software, then choose your USB flash drive as the save destination. When the download completes, quit Boot Camp Assistant.
Learn what to do if you can't download or save the Windows support software.
Install the Windows support software
After downloading the Windows support software to your flash drive, follow these steps to install the software. (If you're attempting to resolve issues with a Bluetooth mouse or keyboard, it might be easier to use a USB mouse or keyboard until these steps are complete.)
- Make sure that the USB flash drive is plugged into your Mac.
- Start up your Mac in Windows.
- From File Explorer, open the USB flash drive, then open Setup or setup.exe, which is in the WindowsSupport folder or BootCamp folder. When you're asked to allow Boot Camp to make changes to your device, click Yes.
- Click Repair to begin installation. If you get an alert that the software hasn't passed Windows Logo testing, click Continue Anyway.
- After installation completes, click Finish, then click Yes when you're asked to restart your Mac.
Learn more
If you can't download or save the Windows support software:
- If the assistant says that the Windows support software could not be saved to the selected drive, or that the USB flash drive can't be used, make sure that your USB flash drive has a storage capacity of at least 16GB and is formatted correctly.
- If the assistant doesn't see your USB flash drive, click Go Back and make sure that the drive is connected directly to the USB port on your Mac—not to a display, hub, or keyboard. Disconnect and reconnect the drive, then click Continue.
- If the assistant says that it can't download the software because of a network problem, make sure that your Mac is connected to the Internet.
- Make sure that your Mac meets the system requirements to install Windows using Boot Camp.
If a Mac feature still doesn't work after updating the Windows support software, search for your symptom on the Apple support website or Microsoft support website. Some features of your Mac aren't designed to work in Windows.